Why choose screwed type valves ?
Screwed type valves offer benefits where space is limited – as the overall diameter of the valve is only marginally bigger than the pipe size.
In certain confined space installations, a barrel union may be required to fit or remove the valve.
Thread Specifications
Maric screwed valves threads conform to (AS ISO 7.1-2008), and the industry norm of:
Parallel female series RP
Tapered male series R
(Teflon tape in the joint is recommended for a water tight seal).
BSP threads are available in many sizes, in M&F, F&F, and F&M.
NPT threads are available in F&F only.
What the Maric Valve does
The Maric Flow Control valve is designed to deliver a fixed, pre-set, constant (maximum) flow of water – irrespective of pressure differential across it within a given range, typically 140-1000 kPa.
This means constant flow rate, irrespective of fluctuating pressure upstream or downstream of the valve.
Control rubbers, together with the shape of their enclosure, controls the flow rate.